Burnham: Measures of Proper Motion Stars 
A and 0 (10.8) 
1908.266 
28o?38 
I 7 i "53 
.288 
280.57 
172.07 
.291 
280.68 
171.42 
1908.28 
280.54 
171.67 
The only earlier direct measures of A a 
are: 
1887.43 279°. 7 3 
I72"o6 
2n 
Eng 
1894.49 280.03 
172.27 
2n 
Eng 
1908.28 280.54 
171.67 
3 n 
P 
A mean of the first two compared with the last 
gives the 
proper motion of the large star: 
o"n6 in 204?4 
This smaller value has some support in the measures of the 
large stars as compared with the places in A. G. Albany, al¬ 
though B and C may have some motion of their own. The 
faint star may be treated as fixed. The errors of the microm¬ 
eter places, and especially the shortness of the interval, doubt¬ 
less have some effect, but this will be done away with by later 
measures. 
The meridian values of the proper motion of the large star 
are: 
Stumpe 
o"i7i 
in 
2i3°6 
Porter 
0.175 
in 
215-7 
Boss 
0.173 
in 
209.7 
X Coronae (5.0... II. 7) 
R. A. I5 h 46 m 43 s Decl. + 36° 2' 
1909.304 
202?20 
1 39"73 
.340 
202.48 
139.40 
•342 
202.35 
139-93 
1909 33 
202.34 
13969 
There are no other measures of the small star. 
The proper motion of x Coronae is given: 
Auwers 
o '.'359 
in 
i86?4 
Porter 
0.360 
in 
185.8 
Boss 
0.364 
in 
182.1 
39 Serpentis (6.0...I2.0) 
R. A. 15” 47 m 37 s Decl. + 13 0 34' 
I 907 .I 97 
H 5°6 
98"o8 
.214 
Ii 5-7 
98.55 
.217 
II 5-9 
98.16 
1907.21 
H 5-73 
98.26 
For finding the proper motion of the principal star 
we have 
1862.38 130?52 
io6"45 
in 
02 
1883.60 124.02 
101.77 
in 
H 2 
1907.21 H 5-73 
98.26 
3 n 
P 
The proper motion is therefore: 
Measures 
o".6\6 in 
196^0 
Auwers 
0.562 in 
198.8 
Porter 
0.580 in 
198.0 
Boss 
0.586 in 
196.0 
Y Serpentis ( 4 . 0 ... 10 . 6 ) 
R. A. I5 h 50™ 55 s Decl. + 16 0 3' 
A and B 
1908.041 3I5?02 20l"0I 
.156 3I5-05 201.92 
•192 3I5-30 201.65 
1908.13 
315-12 
201.53 
B and C (n.o) 
1908.041 
i 6 S ?38 
I 77"05 
.156 
165.42 
177.14 
. 192 
165.23 
177.18 
1908.13 
165.34 
177.12 
No other measures of C. 
For AB we 
have: 
1850.41 299°o8 
I 39"25 
in 
02 
1854.38 300.88 
143-44 
in 
02 
1883.47 309.37 
173-55 
2n 
PI 2 
1908.13 315-12 
201.53 
3 n 
P 
From which we have the corrected 
proper 
motion of y 
Serpentis: 
Measures 
1 " 34 i in 
164° 5 
Auwers 
1.313 in 
167.5 
Newcomb 
1.324 in 
166.9 
Boss 
1.332 in 
166.9 
49 Librae (5.4... II 
• o) 
R. A. I5 h 53 m 
36 s Decl. - 
—16 0 ii' 
1907.444 
3o6?35 
I 55"29 
7-463 
306.15 
155.58 
8.192 
306.63 
154-52 
8.249 
306.65 
154-92 
1907.84 
306.44 
155 -oS 
We have the following measures : 
1886.38 301?28 
162"70 
211 
Eng 
1894.49 302.72 
159-54 
in 
Eng 
1907.84 306.44 
I55.o8 
4 n 
P 
Rejecting the single measure for obvious error, we have for 
the proper motion of 49 Librae: 
o"754 in 241 °.g 
The meridian values are 
nearly 
the 
same: 
Auwers 
o"775 
in 
241 °-7 
Porter 
0.750 
in 
2396 
Newcomb 
0-737 
in 
238.2 
Boss 
0.749 
in 
2 37-7 
b Ophiuchi (2.6...13.0) 
R. A. i6 h 8 m 6 s Decl.—3 0 23' 
1908.192 
294-03 
65"54 
• 249 
2^4.83 
65.26 
.252 
294-50 
65.68 
1908.23 
294-45 
65-49 
48 
